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Measuring basal soil respiration across Europe: Do incubation temperature and i...

The European Commission recognises the essential role of soil biology in soil functioning and delivery of ecosystem services, but information is currently lacking evaluate of how these vary across soil and land-use types at a European scale. This study evaluated the measurement of the initial rate of soil basal respiration (BR) as a potential biological indicator of ecosystem service provision. The purpose of t...

Glutathione-S-transferase activity and histological changes following exposure ...

Effect of the matrix on the 1.5 μm photoluminescence of Er-doped silicon quantu...

Erbium doped nanocrystalline silicon thin films were produced by reactive magnetron r.f sputtering. Their structural and chemical properties were studied by micro-Raman, spectroscopic ellipsometry and Rutherford backscattering spectroscopy. Films with different crystalline fraction and crystallite size were deposited by changing the deposition parameters. The impact of the composition and structure of Erbium io...

Study of the oxygen role in the photoluminescence of erbium doped nanocrystalli...

We have produced and studied erbium doped nanocrystalline silicon thin films with different oxygen and hydrogen content in order to evaluate the influence of the matrix on the Er3+ emission and on the 0.89 eV and 1.17 eV bands. Films were grown by reactive magnetron sputtering on glass substrates under several different conditions (RF power, Er content and gas mixture composition) in order to obtain different m...

Produção integrada e qualidade do azeite virgem

O artigo foi apresentado como comunicação no IV Simpósio Nacional de Olivicultura que decorreu em Elvas de 22 a 24 de Setembro de 2006. ; A evolução dos inimigos-chave do olival que mais influenciam a qualidade do azeite, mosca-da-azeitona e gafa, foi avaliada na cultivar ‘Galega Vulgar’ na Beira Baixa e na cultivar ‘Azeiteira’ no Norte Alente1ano, em Produção Integrada, durante as campanhas de 2004 e 2005. Fo...

Near-band-edge slow luminescence in nominally undoped bulk ZnO

We report the observation of slow emission bands overlapped with the near-band-edge steady-state luminescence of nominally undoped ZnO crystals. At low temperatures the time-resolved spectra are dominated by the emission of several high-energy bound exciton lines and the two-electron satellite spectral region. Furthermore, two donor-acceptor pair transitions at 3.22 and 3.238 eV are clearly identified in temper...

Hybrid modelling of a PHA production process using modular neural networks

The molecular basis of dominantly inherited beta-thalassemia.

In this study, we sought to clarity the molecular basis of a dominant inherited beta-thalassemia, found in heterozygosity in a northern Portuguese family with thalassemia intermedia. We characterized: i) the alpha-globin gene cluster structure; ii) the beta-globin gene cluster haplotype; and iii) the beta-thalassemia mutation. The alpha-globin gene cluster was structurally normal. The G-->T transversion at codo...